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The C63 AMG has the P31 package which provides the 6.2 liter M156 V8 with stronger forged internals and a more aggressive tune. It is about equal to a C63 AMG with a tune on it so power should be somewhere in the low 420 WHP range. So the M5 has more power, but also a few hundred more pounds to carry.

The C63 belongs to BenzBoost member @xtyper and he claims it is stock. The M5 is also stock. Hard to understand why the M5 does not pull away up top with all that horsepower.

I'm not surprised with the results considering the weight of that m5. Depending on how many runs both cars had before this, the M5 would be more prone to heatsoak in that kind of weather. But a win is a win, so congrats to the p31 c63.

Originally Posted by Sticky

*If*

Shouldn't really matter though. These turbo motors aren't all they are cracked up to be...

If this was the same guy named Sam in the F10 M5 then he couldve definitely been heat soaked IMO....I also ran him twice in my FBO 335i...First time I barely edged him out and then he got me the second time due to few issues I had...The owner was running almost non stop the whole day and from what I saw had over 25+ runs easily (if not more).....just saying the M5 definately had to be somewhat heat soaked a good part of the day since he didnt take many breaks...not to take anything away from @xtyper as his car is still a bad ass benz and won regardles

Most assume this is attributable to a more aggressive factory tune put on the Black Series. However, most dyno runs of the P31 show it is underrated and actually making closer to the 510 crank horsepower that the Black Series is rated at

If this was the same guy named Sam in the F10 M5 then he couldve definitely been heat soaked IMO....I also ran him twice in my FBO 335i...First time I barely edged him out and then he got me the second time due to few issues I had...The owner was running almost non stop the whole day and from what I saw had over 25+ runs easily (if not more).....just saying the M5 definately had to be somewhat heat soaked a good part of the day since he didnt take many breaks...not to take anything away from @xtyper as his car is still a bad ass benz and won regardles

Honestly which guy were you? I guess I was too busy running around to really meet anyone.

Oh the good old heatsoak excuse...awesome can't wait for the next gen turbo M3.

I can already hear it now.

I know right ? LMFAO. How bout this - buy a car that isn't a piece of $#@! that can only run once before it overheats. I've said it before regarding certain cars and power adders that only have a short peak performance life - if they can't achieve the same, consistent results all day long on the street and on the track in 100 degree heat then it's a worthless piece of $#@!.

EDIT -

I ran the Weistec E63 biturbo and that thing never had heat soak AND it had the upgraded turbos. Go figure.